Conveners
Wed-Af-Po.07 - Modelling and Analysis
- Michael Sumption (The Ohio State University)
- Henryk Piekarz (Fermilab)
The transformer in the power supply is naturally sensitive to the external magnetic field, and its operating characteristics are easily changed under the influence of the strong external stray magnetic field, resulting in the change of the operating characteristics of the power supply and even failure. Therefore, the establishment of an accurate transformer model under the external magnetic...
For designing high-field electromagnets, the Lorentz force on coils must be computed to ensure a support structure is feasible, and the inductance should be computed to evaluate the stored energy and dynamics. Also, the magnetic field and its variation inside the conductor is of interest for computing stress and strain, and due to superconducting quench limits. For these force, inductance,...
Using MACSYMA—the superb computer calculus program developed at MIT in the 1970s, ‘80s, and ‘90s—I have derived, verified, and meticulously simplified the analytic formulas for all magnetic quantities generated by any system of coaxial, axisymmetric, rectangular-cross-section (RCS), uniform-current-density (UCD) coils. All formulas now have the same constant of integration—zero—verified by...
The finite element analysis method is a commonly used and accurate approach for calculating the stress in electromagnetic coils. However, for dry-wound coils with nonlinear contact behavior, especially those with many turns, these methods are often time-consuming and may have convergence issues. Therefore, this study proposes a semi-analytical stress analysis method specifically designed to...
The design and operation of superconducting accelerator magnets necessitate accurate knowledge of thermal conditions to ensure their stability and performance. During the operation of these magnets, quench events can lead to complex thermal transients. Their analysis is commonly supported by detailed simulations, for which the finite element (FE) method can be used. The FE method offers...